{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/42140"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/42140","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Scanning transmission electron microscopy (STEM) and X-ray absorption spectroscopy (XAS) investigations of catalytic systems","abstract":"Because of their importance to energy production, understanding and improving catalytic materials is essential to further advances in their development and use. The following work discusses the experimental investigation of various supported and unsupported noble metal nanoparticles using, predominantly, X-ray absorption spectroscopy (XAS) and scanning transmission electron microscopy (STEM) or spherical aberration-corrected STEM (Cs-STEM). Although the majority of the work focuses on γ-Al2O3 supported nanoparticles because of their industrial importance for fuel production, several other systems are also addressed. These include understanding the structural characteristics of unsupported noble metal nanoparticles (Au, Ag, Pt, Pd, Ir and Rh) as a function of size and Pt-Pd nanoparticles formed in core-shell, reverse core-shell and alloy motifs. Regardless of the system investigated, all experiments revealed information about how the nanoparticle catalysts were structured and/or behaved under catalytic conditions.","abstract_html":"Because of their importance to energy production, understanding and improving catalytic materials is essential to further advances in their development and use. The following work discusses the experimental investigation of various supported and unsupported noble metal nanoparticles using, predominantly, X-ray absorption spectroscopy (XAS) and scanning transmission electron microscopy (STEM) or spherical aberration-corrected STEM (Cs-STEM). Although the majority of the work focuses on γ-Al2O3 supported nanoparticles because of their industrial importance for fuel production, several other systems are also addressed. These include understanding the structural characteristics of unsupported noble metal nanoparticles (Au, Ag, Pt, Pd, Ir and Rh) as a function of size and Pt-Pd nanoparticles formed in core-shell, reverse core-shell and alloy motifs. Regardless of the system investigated, all experiments revealed information about how the nanoparticle catalysts were structured and/or behaved under catalytic conditions.","abstract_has_math":false,"creators":["Small, Matthew"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemical Physics","degree_department":null,"school":null,"contributors":["Nuzzo, Ralph G.","Gewirth, Andrew A.","Murphy, Catherine J.","Zuo, Jian-Min"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-02-03T19:17:05Z","date_published":"2013-02-03T19:17:05Z","updated_at":"2026-07-22T22:25:31Z","subjects":["heterogeneous catalysis","aberration-corrected","scanning transmission electron microscopy","Pt","Al2O3","Noble metal"],"languages":["en"],"rights":["Copyright 2012 Matthew Small"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/42140","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Nuzzo, Ralph G.","Gewirth, Andrew A.","Murphy, Catherine J.","Zuo, Jian-Min"]},{"key":"dc:creator","label":"Author","values":["Small, Matthew"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2013-02-03T19:17:05Z","2015-02-03T11:00:49Z","2012-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemical Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["heterogeneous catalysis","aberration-corrected","scanning transmission electron microscopy","Pt","Al2O3","Noble metal"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2012 Matthew Small"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/42140"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Because of their importance to energy production, understanding and improving catalytic materials is essential to further advances in their development and use. 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